Few people know of the existence of zoanthropes, a race of creatures whose unique physiognomy allows them to transform from humans into animals and back again. This unusual condition means that these individuals are naturally suited to the martial arts and one-on-one combat, since their animal incarnations can tear through human opponents in a matter of seconds. Never enrage a zoanthrope - you won't escape alive.

A mysterious code is discovered in the process of analyzing the human genome. It becomes apparent that a certain genetic code, formerly considered to be only a background anomaly because it failed to match any human characteristic, would bring surprising changes to the human body through stimulation of that code. By activating this code, the characteristics and capabilities of other species latent in the human body can be awakened and give birth to beings with superhuman physical powers and agility. The result? A human-beast amalgam and the development of the zoanthropic phenomenon.

Thus a species which, for various reasons, can transform its body and characteristics begin to appear around the world... all displaying superhuman strength, astounding athletic ability and the power to morph into raging, half-human beasts.

A project team in the medical department of the Tylon Organization, multinational corporation seeks to kidnap, breed and train these zoanthropes, hoping to assemble a nearly indestructible fighting army to take over the world.

While some join willingly, others fight against the Organization to avenge the deaths and disappearances of their own kind. Tigers, wolves, wild boars - will mankind depend on the claws, fangs and cunning of savage beasts to bring the world safely into the next millennium?